2386results about How to "Easy maintenance and repair" patented technology

The invention discloses a patrol robot system for an overhead high-voltage transmission line. The patrol robot system comprises a robot, the overhead line and a ground base station. The overhead line is supported through a cross bar. The robot comprises a robot body, a battery, a walking device, a single-chip microcomputer, a monitor device and a mobile communication device. The ground base station comprises a ground communication device and a ground monitor device. The ground base station and the robot are connected in a satellite communication mode. A robot platform is arranged on one side of the overhead line. The walking device comprises a walking mechanism and an obstacle avoidance mechanism. The walking device is connected with the single-chip microcomputer. The monitor range of the patrol robot is wider, environmental interference resistance is higher, the better obstacle avoidance mechanism is provided, a rest area is provided for the patrol robot, the service life of the patrol robot is prolonged, an automatic charging device is provided, work loads of workers are reduced, and the work of patrolling high-voltage lines and ultra-high-voltage lines can be completed excellently.

The invention discloses a method for automatically monitoring water quality indexes on line and a device for implementing the method. A method of combining an ultraviolet and visible spectroscopy and various sensors is adopted, dozens of water quality indexes including chemical oxygen demand and ammonia nitrogen can be measured at one time, measurement indexes can be configured in a building block mode according to requirements, and chemical agents are not required. According to the device, the constructed digital optical fiber spectrometer is taken as a core, ultraviolet and visible absorption spectrum data of a water sample is processed in a mode of sequentially combining wavelet de-noising, principal component analysis and a support vector machine, and water quality indexes such as chemical oxygen demand and biochemical oxygen demand of water are acquired. Various physical and electrochemical sensors acquire water quality indexes such as ammonia nitrogen, dissolved oxygen and conductivity. All hardware and software for implementing the method is put in a cabinet to form the device, and the device analyzes the introduced water sample under the control of an embedded industrial control computer system, and automatically monitors the water quality indexes in real time.

The invention relates to an antirust oil spraying device, and in particular relates to a rapid mechanical component antirust oil spraying device. The technical problem to be solved by the invention is to provide the rapid mechanical component antirust oil spraying device which is uniform in spraying, saving in material, and convenient to operate. In order to solve the technical problem, the invention provides the rapid mechanical component antirust oil spraying device comprising a base plate, a left rack, a box, a water pipe, a first check valve, a cylinder, a piston, a flexible pipe, a processing frame, a right rack, a screen plate, a sprayer, a second check valve and a top plate, wherein the left rack is welded with the left side of the top of the base plate, a first fixing rod is welded with the upper part of the right side of the left rack, and a motor is connected with the first fixing rod via a bolt. According to the device provided by the invention, the effects of being uniform in spraying, saving in material, and convenient to operate are achieved, and the device is low in manufacturing cost, reasonable in structure, prone to maintain and repair, convenient to use, reduced in investment of manpower and material resources and improved in work efficiency.

The invention relates to a comprehensive automation integrated protecting method and a system which adopt an integrated IED to carry out automation functions such as protection, measurement and control, computation and the like of all bay units in a substation; state quantity, analog quantity and digital quantity which are output in interval by primary equipment on a process layer of the substation are respectively uploaded to the integrated IED through an ethernet switcher by a dual Ethernet (100mega / 1000mega), and the protection and automation function of the substation are realized by calculating and processing the state quantity, analog quantity and digital quantity which are output in interval respectively by the integrated IED, therefore, a spacing layer and a substation layer of the substation are unified into one layer according to IEC61850 standard, and a plurality of IEDs are integrated into one integrated protecting IED, and two same integrated IEDs are provided for hot spare for improving the reliability. The comprehensive automation integrated protecting system leads the substation integrated protecting functions to share a uniform information platform, and communication network is used for replacing control cables, thus improving the reliability of the signal transmission, further improving automation and management level and reducing comprehensive construction cost.

The invention relates to a medicine grinding device for medical pediatrics, in particular to a rapid medicine grinding device for medical pediatrics. The technical effect of providing the rapid medicine grinding device for medical pediatrics which is convenient to operate, rapid in grinding and capable of saving time and effort is achieved. In order to achieve the technical effect, the rapid medicine grinding device for medical pediatrics comprises a grinding disc, a rotary shaft, a first bearing seat, a swing rod, a gear, an air cylinder, a first connecting rod, a first fixing plate, a rack, a sliding block, a sliding rail, a second fixing plate and the like. A servo motor, an upper bearing seat and a lower bearing seat are sequentially arranged on the inner left wall of a mounting frame from top to bottom. A lead screw is mounted between the upper bearing seat and the lower bearing seat. The effects of convenient operation, rapid grinding and time and effort saving are achieved; and the rapid medicine grinding device is low in manufacturing cost, reasonable in structure, easy to maintain and repair and convenient to use, input of manpower and material resources is reduced, and the working efficiency is improved.

The invention discloses an integral wind-power blade ultraviolet light / electron beam in situ curing fiber laying forming device and an integral wind-power blade ultraviolet light / electron beam in situ curing fiber laying forming method, which can be applied to the automatic manufacturing field of large-scale composite material wind-power blades. Aiming at the problems that a perfusion and mold-splitting type wind-power blade manufacturing process has low degree of automation, high labor intensity and unstable quality, a two-piece type wind-power blade has low bonding strength, integral strength and stiffness, blade laying cannot be optimally designed, and a large-scale wind-power blade is difficultly manufactured and the like, the invention adopts the ultraviolet light in situ curing fiber laying manufacturing method and the ultraviolet light in situ curing fiber laying manufacturing device. According to the method, an ultraviolet light / electron beam in situ curing process is utilized for completing the forming and curing processes of the large-scale wind-power blade one time, the large-scale wind-power blade is integrally formed, and the curing efficiency and the overall performance of the blade are improved. Meanwhile, a large-scale wind-power blade fiber laying manufacturing system is combined and comprises an ultraviolet light / electron beam in situ curing fiber laying head, a presoaking belt conveying system, a core mold supporting device, an integral wind-power blade core mold, a horizontal or vertical multi-freedom machine tool system and a laying control system so as to realize the automatic manufacturing of the integral large-scale wind-power blade.

The invention discloses a gas conveying pipeline metering and pressure adjusting device. The gas conveying pipeline metering and pressure adjusting device comprises a first flange, a second flange, a first process pipeline, a second process pipeline, a first manifold, a second manifold, pipe caps, a multi-path pressure and flow control device and an instrument junction box. One end of the first process pipeline is connected with the first flange, and the other end of the first process pipeline is connected with the first manifold. One end of the second process pipeline is connected with the second flange, and the other end of the second process pipeline is connected with the second manifold. The pipe caps are connected to the two ends of the first manifold and the two ends of the second manifold. The multi-path pressure and flow control device is arranged between the first process pipeline and the second process pipeline. The invention further provides a gas conveying pipeline metering and pressure adjusting method. The gas conveying pipeline metering and pressure adjusting device and method have the beneficial effects that real-time detection and control over pressure and flow of a gas conveying pipeline station field can be achieved, high accuracy is achieved, running is stable, remote detection and control of an SCADA system are facilitated, and later maintaining and overhauling are facilitated.

The invention discloses a drilling device applied to graphite mold production. The drilling device comprises a frame and a drilling table; drilling longitudinal frames and a drilling transverse frame are arranged on the frame; the drilling longitudinal frames are positioned at the two sides of the frame; the drilling transverse frame is positioned between the drilling longitudinal frames, and is provided with a lifting driving mechanism and a lifting mechanism; the lifting mechanism includes lifting platforms and lifting lead screws; the lifting lead screws are mounted in the drilling longitudinal frames, and are connected with lifting lead screw connecting bases; the lifting lead screw connecting bases are connected with the lifting platforms; drilling mechanisms are arranged on the lifting platforms, and include drilling motors and drilling lead screws; the drilling motors are connected with drilling motor output shafts; the drilling motor output shafts are connected with drilling speed reducers; the drilling speed reducers are connected with the drilling lead screws; the drilling lead screws are connected with drilling bases; and the drilling bases are connected with drill rods. The machine is simple in structure, strong in pertinency, precise in positioning and excellent in drilling effect, and preferably solves the drilling problem in the graphite mold production.

The invention relates to an in-situ digitization method and a device of primary equipment of a substation; the in-situ digitalizer is arranged in each gap of the primary equipment on a spacing layer of the substation; the in-situ digitalizer respectively collects the status quantity such as a switch and a disconnecting link and the like in the same gap to convert into GOOSE format message, and respectively collects mutual inductor digital quantity and analog quantity information in the same gap to convert into sampling value transport format message, and the information processed by the in-situ digitization is sent out to a local area network in a process layer of the substation; the local area network in the process layer receives the GOOSE format message for converting into the open-closed operation control of the switch and the disconnecting link. The in-situ digitization method and the device thereof of the substation share the information in a uniform information platform, and the communication network is used for replacing control cables, thus being convenient for the design, construction, extension-construction of the substation, improving the reliability, further improving automation and management level and reducing comprehensive construction cost.

The invention discloses integrated type hydrogen energy preparation, storage and cyclic utilization equipment. The integrated type hydrogen energy preparation, storage and cyclic utilization equipment mainly comprises a solar power generation light source, a water electrolysis hydrogen production device, a high-pressure hydrogen storage buffering tank, a metal hydride hydrogen storage tank and a hydrogen fuel cell device, which are connected by a multi-channel control valve and related pipelines, and a thermal medium circulating pipe system is arranged; the thermal medium circulating pipe system is provided with a first heat exchanger, a second heat exchanger and a third head exchanger, which are serially connected with one another to form a circulating loop, the first heat exchanger is arranged inside the solar power generation light source, the second heat exchanger is a arranged inside the metal hydride hydrogen storage tank, the third head exchanger is arranged inside the hydrogen fuel cell device, and a medium circulating pump and a medium electric heater are arranged on the circulating loop of the thermal medium circulating pipe system respectively. The integrated type hydrogen energy preparation, storage and cyclic utilization equipment is simple in structure, low in cost, good in hydrogen storage and desorption effect, high in hydrogen energy cyclic utilization rate and stable and safe to operate, and is particularly suitable for hydrogen fuel energy-saving automobiles and portable mobile equipment using hydrogen fuel power supply.

The invention relates to an initial rainwater discarding device, which consists of a water inlet pipe, a collecting pipe, a primary discarding pipe, a secondary discarding pipe and a box body, wherein the box body is formed by nesting a primary box body, a secondary box body and a third-level box body; the water inlet pipe is connected with the primary box body through a cover plate; an overflowing hole is formed on the side wall of the primary box body; a screen cloth is arranged at the upper end of the overflowing hole; the primary discarding pipe is arranged on the bottom of the primary box body; water flow flows into the secondary box body from the overflowing hole and then flows into the third-level box body; the secondary discarding pipe and the collecting pipe are arranged on the bottom of the third-level box body; and the primary discarding pipe and the secondary discarding pipe are provided with control valves. The initial rainwater discarding device has the advantages of separating initial rainwater with complex pollutants and high pollution level from later-period rainwater effectively by discarding and overflowing twice, and controlling clean rainwater to fulfill the aim of resource recycling, along with simple structure, durability, no damageable electronic equipment, high reliability and convenient maintenance and overhauling.

The invention provides a comprehensive power supply system with a remote monitoring function. The comprehensive power supply system comprises a box, wherein the box comprises a base plate, wall bodies and a top cover, and a high-voltage room, a transformer room, a low-voltage room and an industrial personal computer are arranged in the box; in a box-type substation, the high-voltage room, the transformer room and the low-voltage room are provided with doors and windows, and exhaust fans are arranged on the windows, so that natural ventilation and mechanical ventilation are combined, and maintenance is convenient; the wall bodies and clapboards on the circumference of the substation are respectively provided with inner-layer steel plates and outer-layer steel plates, a cavity is formed between each inner-layer steel plate and outer-layer steel plate, and fireproof sound-insulation cotton is arranged in each cavity; and radiation heat-dissipation cooling coating coats the surface of each outer-layer steel plate. The radiation heat-dissipation cooling coating can radiate object heat and achieve heat-dissipation waterproof functions; and the radiation heat-dissipation cooling coating can automatic radiate the heat of the coated object to an atmospheric space, reduces surface and interior temperature of the box-type substation and also achieves a soundproof function.

A megawatt-level semi-direct driving wind generator comprises a wind wheel, a distance changer, a main axle, a speed accelerating box, a coupler, a generator, a cabin chassis, a bias motor and a control system. The chassis is fixed with the bias motor and the generator, the accelerating box is fixed with the side wall of the chassis, the accelerating box is first-stage planet accelerating gear box, and the motor is low-speed permanent magnetic three-phase synchronous generator. The invention can stabilize the transmission of transmitter, reduce impact, and reduce sealing demand or the like, with adjustable installed height, simple structure, high strength and accurate angle control on distance change as 0.1 degree, to output constant power.

The invention relates to a full-automatic smart seam-beautifying machine, and belongs to the technical field of building mechanical equipment. The full-automatic smart seam-beautifying machine comprises a rectilinear track, a translation frame, a seam-wall polishing system, a seam dust-removing system and an agent-injecting system, wherein the seam-wall polishing system is used for polishing the side wall of a seam, the seam dust-removing system is used for removing residue in the seam, and the agent-injecting system is used for injecting tile seam-beautifying agent in the seam. The translation frame is slidably installed on the rectilinear track, the polishing system, the seam dust-removing system and the agent-injecting system are all installed on the translation frame, a track positioning system and a stopping system are further included, and used for positioning the rectilinear track and driving the translation frame to stop moving correspondingly. According to the full-automatic smart seam-beautifying machine, seam-buckling, polishing, dust-removing and agent-injecting can be automatically conducted to the tile seams in a straight line by adopting the structure, the working efficiency is high, and the intelligent degree is high; and the seam-beautifying effect is stable and even, and the practicability is high.

The invention discloses single-dip pipe silicon iron bath vacuum circulated magnesium-smelting device and method. The device comprises an induction furnace (101), a vacuum reaction chamber (104), a single dip pipe (102) and an argon blowing pipe (110) with a side wall communicated with guided flows; and besides, the device also comprises a magnesium steam condenser (206), a magnesium liquid spray thrower (210), a magnesium liquid storer (202) and magnesium mining powder conveying and spraying devices (111)-(115), wherein the magnesium steam condenser (206), the magnesium liquid spray thrower (210) and the magnesium liquid storer (202) are communicated. The method comprises the following steps of: preparing silicon iron liquid with the silicon content of 30%-65% and the temperature of 1,350-1,600 DEG C, making the mixtures of the silicon iron liquid and magnesium mining powder blown into the silicon iron liquid annularly flow between a vacuum reaction device and the induction furnace at the vacuum degree of 350 Pa-10,000 Pa for reaction to generate magnesium steam, carrying out condensation and magnesium liquid spraying to the magnesium steam to generate magnesium liquid, making the magnesium liquid flow into a storing device, and then pouring magnesium ingots. The device has the advantages of energy saving, low consumption, high productivity and the like.

The invention relates to an animal husbandry smashing device, in particular to a pasture smashing device for animal husbandry. The pasture smashing device for animal husbandry is complete and uniform in smashing and simple in structure. In order to achieve the technical aim, the pasture smashing device for animal husbandry comprises a bottom plate, a left frame, a guide sleeve, a first bearing seat, a collecting frame, a motor, a first rotary shaft, a small belt wheel, a flat belt, a large belt wheel, an installing plate, a second rotary shaft, a first bevel gear, a third rotary shaft, a second bevel gear and the like. A smashing box is arranged over the bottom plate. The effects of being complete and uniform in smashing and simple in structure are achieved, the manufacturing cost is low, the structure is reasonable, and maintenance and repair are easy; use is convenient, investment of manpower and material resources is reduced, and cost is reduced.

The invention relates to a method for navigating and positioning a multi-joint arm mechanical sensing type ultrasonic image, which mainly comprises a mechanical sensing component combining method, and a navigating and positioning method, wherein the method adopts a six-joint arm with a sensor to directly measure the real-time position of an ultrasonic probe; the multi-joint arm adopts the combination form that rotating shafts of two electric joints and four passive joints are mutually perpendicular; the x-direction displacement only depends on the intersection angle of the electric joint group and is unrelated to the intersection angle of the passive joint group when the probe position is measured and controlled; and the y-direction displacement of a probe pedestal only depends on the intersection angle of the passive joint group and is unrelated to the intersection angle of the electric joint group. The method adopts a semi-active structure mode that the electric joint group is matched with the passive joint group mutually. The method has the advantages of simple and compact structure, safety and stability.

A modular electric wall heater comprises an upper main box components, a lower main box component, a left side panel component, a right side panel component, a flame simulator component, a fake ash component, a front panel component, and a rear panel component; the left side panel component and the right side panel component connect with the upper main box component and the lower main box component to form an enclosure; the flame simulator component situates inside of the enclosure and is connected with the left side and right side panel component; the ashes component situates inside of the enclosure, and on the top of the and connect to a bottom panel of the lower main box component, the frontal panel component is situate on the frontal opening of the enclosure and the rear panel component is situate on the rear opening of the enclosure.

The invention discloses an avoidance needless type stereoscopic garage. The avoidance needless type stereoscopic garage comprises an upright post, a vehicle carrying board, a track, a lifting device, a rotating device, a moving device and an anti-falling device, wherein the vehicle carrying board is mounted on the upright post and can be controlled by the lifting device to move up and down along the upright post; the upright post is mounted on the rotating device which can drive the upright post to rotate, and the rotating device is mounted on the moving device, a driving wheel and a guide wheel of the moving device are mounted on the track and drive the rotating device to move along the track horizontally; the anti-falling device is further arranged on the upright post; the lifting device adopts chain transmission for transmission, so that the transmission is stable; the rotating device adopts an incomplete gear mechanism for transmission, so that the installation space of the avoidance needless type stereoscopic garage is saved; and the anti-falling device adopts an anti-falling baffle which is arranged in a transverse sliding chute of the upright post, and the anti-falling safety performance is good. The avoidance needless type stereoscopic garage adopts three motors for independent control, the control mode is simple, further, the structure is simple, and maintenance and repairing are facilitated.

The invention discloses an on-sea floating-type wind power generation platform capable of collecting wave energy and a gathering group. The power generation platform comprises a draught fan buoy floating on the sea surface, and the draught fan buoy is perpendicularly provided with a wind driven generator. The power generation platform is characterized in that multiple wave buoys arranged around the draught fan buoy are further included; the opposite faces of each wave buoy and the draught fan buoy are parallel to each other and are connected, a plurality of transmission devices are oppositely arranged at the joints of the wave buoys and the draught fan buoy, a plurality of corresponding hydraulic cylinder power generation devices are arranged in cavities of the draught fan buoy and the wave buoys, and the transmission devices are connected with the corresponding hydraulic cylinder power generation devices; the transmission devices drive the hydraulic cylinder power generation devices to convert the wave energy into electric energy through relative rotation generated when the wave buoys and the draught fan buoy move vertically along with waves. The power generation platform can achieve combined power generation of wind energy and the wave energy and is few in energy conversion step, simple in structure, easy to achieve and convenient to maintain, and the power generation platform which is simple, good in stability and high in benefit is supplied to a deep sea on-sea power generation field.

The invention relates to a mixing device used in animal husbandry, in particular to a feed mixing device used in animal husbandry. The technical problem to be solved by the invention is to provide the feed mixing device used in animal husbandry, which is thorough in mixing, uniform in mixing and simple in structure. In order to solve the technical problem, the feed mixing device used in animal husbandry comprises a base plate, a motor, a cylinder, a first supporting rod, a collecting frame, a first bearing seat, a first reel, a fixed pulley, a first pull rope, a second bearing seat, a gear and the like, wherein a left rack is arranged on the left side of the top of the base plate; second supporting rods are symmetrically arranged on the upper part of the right side of the left rack; a material storage box is arranged at the right ends of the second supporting rods; and the top end of the left side of the material storage box is hinged to and connected with a first box cover. The feed mixing device used in animal husbandry achieves the effects that the device is thorough in mixing, uniform in mixing and simple in structure, the device is low in manufacturing cost, easy to maintain and repair and convenient to use, and the device can provide favorable conditions for workers directly, accurately and quickly.

The invention relates to a wastewater recycling comprehensive processing method, which comprises the following steps that: wastewater is pretreated by adoption of the physicochemical technique and the biochemical technique; the water after pretreatment is separated by adoption of an immersed ultrafiltration solid-liquid separation system; the water passing through the immersed ultrafiltration solid-liquid separation system is processed by a reverse osmosis system again; and the water passing through the reverse osmosis system is reclaimed water. The method separates a biochemical system from a membrane system and makes the biochemical system and the membrane system operate independently, thereby avoiding the influence of the biochemical technique on the membrane separation system, also avoiding the influence of the operation and the maintenance of the membrane system on the biochemical technique particularly under the condition of chemical cleaning, making the biochemical technique and the membrane separation plant respectively reach the optimum treatment effect, and making wastewater treatment more completely.

The invention relates to a pulse water flow forming system driven by the hydraulic power of fountain and surf. Water enters a branch pipe through a main pipe and an air pressure storage tank after being pressurized by a water pump, enters respective capillary pipes in a manner of the pulse water flow with the pressure rising quickly and dropping slowly after passing though pulse valves in the front of the respective capillary pipes, and is jet in pulse manner through sprayers (nozzles) installed on the respective capillary pipes for people to appreciate and play. Jet water flows back to a water source to recycle after confluence, sterilization and filtering. As the pressure rises quickly while drops slowly, based on the design of the air pressure storage tank, jet water flow has the characteristics of strong explosive force, slow drop, good visual effect and strong appreciation. The pulse frequency can be regulated in a large range; the sprayers (nozzles) of different groups and different types can be driven through setting pulse valves at different frequencies, so that the jet water flow has changeable patterns, rises one after another, and is interesting. Compared with an electronically controlled system driven by electrical power, the system adopts simple structure, has good safety, needs low investment cost, and is easy to maintain and repair.

The invention relates to a rehabilitation medical bed, and especially relates to a rehabilitation medical bed used for assisting rehabilitation of both legs. A to-be-solved technical problem is to provide the rehabilitation medical bed used for assisting rehabilitation of both legs. Provided is the rehabilitation medical bed used for assisting rehabilitation of both legs. The bed comprises a base device, a right bed device, a left bed device, a pendulous device, and a leg guard moving device. The base device comprises a base, a sliding rail I, a sliding block I, a positioning bolt I, and a positioning bolt II. The right bed device comprises a right bed board, a connecting frame V, a hip board I, and a hip board II. The left bed device comprises a left bed board, a connecting column, a connecting frame VI, and a connecting frame VII. The leg guard moving device comprises a rear leg guard board, and a front leg guard board, etc. An up-down stretching device comprises a pulley block I, and a pulley block II, etc. A horizontal stretching device comprises a pulley block III, a pulley block IV, a pulley block V, and a pulley block VI. The rehabilitation medical bed used for assisting rehabilitation of both legs can perform multi-azimuth rehabilitation treatment on a patient, and provides convenience for maintenance.

A special gondola vehicle with a shallow concave bottom for coal transportation belongs to the transportation facilities, in particular to a railway truck gondola vehicle. The gondola vehicle comprises a vehicle body, a vehicle coupler buffer device, a braking device and a bogie. The vehicle body comprises a chassis, a side wall and an end wall. The key technique is that the chassis comprises a centre sill, a sleeper beam, a lower side beam and an end beam, two downwards concave shallow concave bottoms are arranged between the two sides of the centre sill and between the lower side beam and the sleeper beam in the middle of the side wall, the depths of the shallow concave bottoms are aligned with the lower plane of the centre sill, the side wall comprises a side wall board and a side post, the two ends of the side wall are end door panels which are inwards concave with respect to the side wall board to form stages, so as to form the end door plate with a concave structure. The invention not only effectively increases the vehicle body volume, but also decreases vehicle height of center of gravity, and improves vehicle riding quality.

The invention relates to a mashing device for medical herbs of the traditional Chinese medicine department, in particular to a fast mashing device for the medical herbs of the traditional Chinese medicine department. According to the technical problem to be solved, the fast mashing device for the medical herbs of the traditional Chinese medicine department is high in mashing efficiency and mashing speed and saves time and labor. To solve the technical problem, the fast mashing device for the medical herbs of the traditional Chinese medicine department comprises a bottom plate, a support, a bearing pedestal, a first belt wheel, a cam, a flat belt, a fan-shaped gear, a second belt wheel, a rotating motor, an L-shaped supporting rod, a first sliding block and the like. The support is welded to the left side of the top of the bottom plate. The bearing pedestal is connected to the top of the support in a bolt connecting manner. A first rotating shaft is in interference fitting with a bearing in the bearing pedestal. The fast smashing device has the beneficial effects of being high in mashing efficiency and mashing speed and saving time and labor. Moreover, the fast mashing device is low in manufacturing cost, reasonable in structure, easy to maintain and repair and convenient to use, and reduces investment of manpower and material resources.

The invention provides a workpiece clamping clamp and a wire spool welder using same. The welder comprises a clamping clamp, wherein a circumferential datum plane is arranged on a positioning base of the clamping clamp; a plurality of clamping assemblies are arranged on the clamping clamp; each clamping assembly can reciprocate in a guiding mode along the circumference; a clamping block of each clamping assembly is driven by a clamping drive mechanism to close to clamp the constitutional units when each clamping assembly moves towards the corresponding circumferential datum plane, and to open when each clamping assembly moves away from the corresponding circumferential datum plane; and each clamping assembly is provided with a fixed station on reciprocating motion stroke, so that an arc-shaped part of each constitutional unit is resisted against the corresponding circumferential datum plane when each clamping assembly moves to the fixed station. When the constitutional units are clamped and fixed by the clamping assemblies, the arc-shaped parts of the constitutional units are further directly resisted against and fixed on the circumferential datum plane by the clamping assembly which moves towards the circumferential datum plane, so that automatic and accurate positioning of each constitutional unit is finally guaranteed.

A five-level voltage source inverting device with few switches and a control method thereof relate to the technological field of a multilevel voltage source inversion, aiming to solve the problem that the complicated topological structure and the control method of a prior multilevel power conversion circuit limit the application of the multilevel inverter in actual usage. The tandem connected C1 and C2 are in bridge connection with the two output ends of the rectifier bridge B, one output end of which is connected with one input end of an H type bridge component consisting of an IGBT3-6 through a voltage control component consisting of an IGBT1-2, the other input end of the H type bridge component is connected with the other output end of the rectifier bridge B. The method and the procedures are as follows, set t0-t18, and t1'-t18' as the time when the positive half, the negative half of a sine wave and a triangular wave cross. A DSP circuit (1) controls the IGBT1-6 through a driving / photoelectric isolation circuit (2) to conduct or close according to the time t0-t18, and t1'-t18'. The circuit structure of the present invention uses fewer components, the control method is simple and reacts rapidly, and therefore the present invention can be widely promoted.

The invention discloses a dynamics comprehensive test bed for a half-unfolding gas bomb with a long tilting rotor wing, comprising a wing, a tilting driving mechanism, a tilting rotor wing nacelle and a power-driven system, wherein the power-driven system is arranged at one end of the wing, the other end of the wing is connected with the tilting driving mechanism, and the tilting driving mechanism is also connected with the tilting rotor wing nacelle and drives the tilting rotor wing nacelle to rotate. By using the structure, the deficiency in test means in research filed of tilting rotor wing gas bomb dynamics problems in China is solved, and the invention provides the test bed capable of researching the stability, tilting transition state dynamic test and vibration control of the tilting rotor craft, which can be used for checking theoretical analysis results.

An immersion acoustic cavitation sewage heat exchanger, belongs to the technical field of heat exchanger decontamination and reinforced heat exchange, characterized that the sewage heat exchanger comprises a ultrasonic generating device composed of a ultrasonic transducer (1) and a ultrasonic oscillating plate (2), a housing (6) of the heat exchanger, a knockout channel (10), a heat exchange tube bundle (11) and end sockets (5, 7) of the heat exchanger; the ultrasonic transducer (1) is immersed in sewage with surface emitting as ultrasonic mode; sewage flows outside the tube while heat exchange medium flows inside; the effect and advantage thereof is that the ultrasonic acoustic cavitation device is capable of decontaminating and cleaning outside surface of the heat exchange tube regularly or at any time, and strengthening sewage turbulence outside the heat exchange tube under the effect of ultrasonic wave, so as to enhance heat exchange efficiency of the heat exchanger. The invention has simple structure which is convenient to maintain and examine, so that the invention can be widely applied in relevant field such as heat supply, air conditioner, refrigerating and chemical engineering.